Vatteluttu , also transliterated as Vattezhuthu, was an alphasyllabic or syllabic writing system of south India (Tamil Nadu and Kerala) and Sri Lanka formerly employed for writing the Tamil and Malayalam languages. The script is a sister system of the Pallava-Chola alphabet. The script was patronized by the Pallava, Pandya and Chera rulers of southern India.
Vatteluttu belonged to the "southern group" of Brahmi derivatives (Southern Brahmi, generally associated with Dravidian languages of south India). The script was used in inscriptions and manuscripts of south India for centuries. It is closely related to the Tamil script (although it is more cursive than the Tamil script, with letters with a single curvilinear stroke). The direction of writing in Vatteluttu is from left to right. It notably omits the virama vowel muting device.